It's hard to put into words, but...
When i get a new game (and by new i mean a game I don't have nes,etc.)...I try it out and have alot of fun playing it, but before long I'm trying out another game I recently acquired. And the cycle continues. I'm staring at the last 20 or 30 games i've purchased, and aside from the LAST 2 games I purchased, i really don't feel any motivation to play them. Often, when i do decide to play some other games, it's the same games i've always played...ie i'll fire up a gradius, or smb, or street fighter, or some puzzle game. I'm not talking about current gen, cause if i buy one of those i'm most likely playing it for awhile.
Anyways, collecting is a bit of an addiction, i'd get just as much gameplay with 1/3 of my collection. or maybe i'm just crazy.